Roll for rolling-mills.



v N. KING, SR. I

I ROLL FOR'ROLLING MILLS.

APPLICATION man JUNE 11. 1914.

Patnted May11,1915.

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Quota 1mg 6 NORMAN KING, $3., or CANTON, OHIO.

' ROLL FOR ROLLING-MILLS.

Specification of Letters Patent.

Application filed June 11, 1914. Serial No. 844,407.

To all whom it may concern:

Be it known that I, NORMAN KING, Sn, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a new and useful Roll for Rolling-Mills, of which the following is a specification.

My invention relates to improvements in rolls for rolling mills and more particularly to reducing and finishing rolls for rolling round bars of steel or iron or other rollable metal, as well as rolling, welding and finishing lap and butt weld pipe and the like.

The object of my invention is to provide rolls which will cause the rod or tube being rolled to be constantly rotated between the rolls during the time that the rolling action is taking place.

Another object is to provide rolls of such a construction that it is not necessary to roll the billet into an oval shape before it is passed between the rolls, the square billet itself being passed between these rolls, a perfect round rod being formed from the billet.

A still further object is to provide rolls of such a construction that there will be no danger of a fin being formed upon the rod which is being rolled.

A still further object is to provide rolls so constructed that in rolling butt weld tubes, the ball will not stick in the tubing such as is frequently the case with the present method of rolling tubing.

A still further object is to provide rolls which will cause the metal to scale freely during the rolling action thus forming a smooth outer surface upon the bar or tube which is being rolled.

With these objects in view the invention consists in the novel construction and arrangement of parts, hereinafter described, illustrated in the accompanying drawings, and particularly pointed out in the appended claim, it being understood that various changes in the form, proportions, size and minor details of construction may be made within the scope of the appended claim without departing from the spirit or sacrificing any of the advantages of the invention.

The drawing shows a rolling mill provided with rolls constructed in accordance with my invention.

The accompanying drawing shows a rolling mill provided with a set of rolls three high constructed in accordance with my invention. Although the drawings show the rolls three high a set of two rolls or any number of rolls desirable may be used with equal efliciency.

The numerals 1, 2 and 3 indicate the top, center and lower rolls respectively, which are mounted in suitable bearing plates 4 of any common and well known construction. Each of the rolls is provided with the usual pinion 5, said pinions meshing with each other and being driven by any suitable means.

The top roll 1 is provided at one end with a collar 6, which is preferably a quarter round in cross section as shown. A groove 7 is formed upon the roll adjacent to the collar 6, said groove in cross section forming substantially one-third of a true circle. A collar 8 of less diameter than the collar 6 is provided upon the roll adjacent to the groove 7 one of the sides 9 of said collar sloping into the groove 7. The opposite side 10 of the collar 8 being similarly inclined toward a groove 11, it forms substantially one-third of a true circle of slightly less diameter than the groove 7. A half round collar 12 of the same diameter as the collar 6 is formed upon the roll adjacent to the groove 11 and is provided upon its opposite side with a groove 13 similar to the groove 7 but of slightly less diameter than the groove 11, said groove 13 being connected by means of the inclined surface 14 with a collar 15 similar to the collar 8. The opposite inclined side 16 of the collar 15 connects with a groove 17 similar to the groove 11 but of slightly less diameter than the groove 13, and a half round collar 18 of the same diameter as the collars 6 and 12 is formed adjacent to the groove 17.

The center roll 2 is provided with the collar 19 which registers with the collar 6 upon the roll 1 the side 20 of said collar sloping into the groove 21 which forms substantially one-third of a true circle of the same diameter as the groove 7 A half round collar 22 is formed adjacent to the groove 21 and registers with the groove 8 upon the roll 1, a groove 23 of the same dimensions as the groove 11 upon the roll 1 being formed upon the roll 2 on the opposite side of the collar 22. A collar 24 is provided upon the roll 2 and adapted to register with the collar 12 upon the roll 1, the sides 25 and 26 of said collar being inclined into the grooves 23 and 27 respectively, the groove 27 being of the same dimension as the groove 13 upon the Patented May 11, 1915.

roll 1. A half round collar 28 similar to the collar 22 is formed upon the roll 2 adjacent to the groove 27 and a groove 29 of the same dimension as the groove 17 is provided upon the roll 2 upon the opposite side of the collar 28. The inclined face 30 of the collar 31 is formed tangential to the groove 29. The bottom roll 3 is of the same form as the top roll 1.

Each of the rolls is rotated in the direction of the arrows shown on the collars at the left end of the rolls.

With this form of rolls it is not necessary to first roll the billet into an oval shape before feeding it between the rolls, the square billet being passed directly between the grooves 7 and 21. By reason of these grooves forming a part of a true circle and by reason of the shape of the inclined sides 9 and 20 of the collars 8 and 19 respectively, the bar being rolled is caused to constantly rotate, transversely in the direction shown by the arrow at this point, as it passes between the rolls 1 and 2. This rotary motion causes the bar 82 to assume a round cross section shown on the drawing. With these rolls it is not necessary for the workmen to hold up the bar as it is being fed between the rolls, the bar being allowed to rotate constantly while it is being rolled. The bar may then be returned between the rolls 2 and 3 through the grooves 21 and 7 and in this instance t 1e bar as shown at 33 will be caused to rotate in the direction of the arrow shown in connection therewith. In order to reduce the diameter of the bar it is then passed between the rolls through the succeeding grooves at 11, 13 and 17 being reduced in diameter with each operation.

At 34 I show a pipe being rolled, said pipe being rotated in the direction indicated by the arrow adjacent thereto. It is customary in rolling pipe to have a ball such as shown at 35 carried by a bar shown in cross section at 36, the pipe being rolled over said ball between the rolls. This ball and supporting bar form no part at all of this invention and are merely shown conventionally for the purpose of illustration. As the pipe is being continually rotated while it is passing between the rolls the usual danger of the ball sticking within the pipe is reduced to a minimum.

By having the open throats formed by the (Topics of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, 1

inclined sides of each of the smaller collars being formed tangential to the circular grooves in the rolls, there is no danger of a fin being formed upon the bar or pipe being rolled. As the bar or pipe is being continually rotated while the rolling action is taking place, the twisting motion thus imparted to the bar or pipe will cause the metal to scale freely thus forming a smooth outer surface thereon.

By using this system of rolling iron of the larger sizes the metal is taken from the puddle mill while it is still in a homogeneous state and while the fiber is forming therein and is passed directly between the rolls thus forming a bar superior to the bar formed by the present system where it is necessary to first form an oval from the billet and where it is necessary to guide the bar through the mill. The bar thus formed is especially adapted for forging into chains and similar products. In rolling large steel bars with these rolls the rolling may be started with the cast or forged bloom.

Although the drawings and above specification disclose the best mode in which I have contemplated embodying my invention I desire to be not limited to the details of such disclosure, for, in the further practical application of my invention many changes in form and construction may be made, as circumstances require or experience suggests without departing from the spirit of the invention, within the scope of the appended claim.

I claim:

In a rolling mill, a set of rolls provided with annular grooves substantially circular in cross section, said annular grooves spaced by means of annular collars formed upon the rolls, each alternate collar being of lesser diameter than the remaining collars, said smaller collars being provided with inclined sides formed tangential to the adjacent grooves, said rolls adapted to constantly rotate the bar being rolled during the time that the rolling action is taking place.

In testimony that I claim the above, I have hereunto subscribed my name in the presence of two witnesses.

NORMAN KING, SR. lVitnesses:

JOHN H. BISHOP, SYLVIA BORON.

Washington, D. C. 

